As jma mentioned, just add a variable representing your mobile device in the repository root then you just have to bind the two different device names in your test case. I switch between two devices in a single test case and it's pretty easy to setup.

Let's say you have a recording that perform a touch operation on a button. That recording should have a parameter where you can bind the name of the device. Add that recording twice to a test case. In your test case, create two parameters containing the name of each device. Bind one name to the first instance of your recording and then bind the second name to the second instance of the recording.